mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
47e7096094
This uses the infrastructure added for memcpy and memmove in r189331. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189458 91177308-0d34-0410-b5e6-96231b3b80d8
140 lines
3.1 KiB
LLVM
140 lines
3.1 KiB
LLVM
; Test memcmp using CLC, with i64 results.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare i64 @memcmp(i8 *%src1, i8 *%src2, i64 %size)
|
|
|
|
; Zero-length comparisons should be optimized away.
|
|
define i64 @f1(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: lghi %r2, 0
|
|
; CHECK: br %r14
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 0)
|
|
ret i64 %res
|
|
}
|
|
|
|
; Check a case where the result is used as an integer.
|
|
define i64 @f2(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: clc 0(2,%r2), 0(%r3)
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: srl [[REG]], 28
|
|
; CHECK: rll [[REG]], [[REG]], 31
|
|
; CHECK: lgfr %r2, [[REG]]
|
|
; CHECK: br %r14
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 2)
|
|
ret i64 %res
|
|
}
|
|
|
|
; Check a case where the result is tested for equality.
|
|
define void @f3(i8 *%src1, i8 *%src2, i64 *%dest) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: clc 0(3,%r2), 0(%r3)
|
|
; CHECK-NEXT: je {{\..*}}
|
|
; CHECK: br %r14
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 3)
|
|
%cmp = icmp eq i64 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i64 0, i64 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested for inequality.
|
|
define void @f4(i8 *%src1, i8 *%src2, i64 *%dest) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: clc 0(4,%r2), 0(%r3)
|
|
; CHECK-NEXT: jlh {{\..*}}
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 4)
|
|
%cmp = icmp ne i64 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i64 0, i64 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested via slt.
|
|
define void @f5(i8 *%src1, i8 *%src2, i64 *%dest) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK: clc 0(5,%r2), 0(%r3)
|
|
; CHECK-NEXT: jl {{\..*}}
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 5)
|
|
%cmp = icmp slt i64 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i64 0, i64 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check a case where the result is tested for sgt.
|
|
define void @f6(i8 *%src1, i8 *%src2, i64 *%dest) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: clc 0(6,%r2), 0(%r3)
|
|
; CHECK-NEXT: jh {{\..*}}
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 6)
|
|
%cmp = icmp sgt i64 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i64 0, i64 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; Check the upper end of the CLC range. Here the result is used both as
|
|
; an integer and for branching.
|
|
define i64 @f7(i8 *%src1, i8 *%src2, i64 *%dest) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: srl [[REG]], 28
|
|
; CHECK: rll [[REG]], [[REG]], 31
|
|
; CHECK: lgfr %r2, [[REG]]
|
|
; CHECK: jl {{.L*}}
|
|
; CHECK: br %r14
|
|
entry:
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 256)
|
|
%cmp = icmp slt i64 %res, 0
|
|
br i1 %cmp, label %exit, label %store
|
|
|
|
store:
|
|
store i64 0, i64 *%dest
|
|
br label %exit
|
|
|
|
exit:
|
|
ret i64 %res
|
|
}
|
|
|
|
; 257 bytes needs two CLCs.
|
|
define i64 @f8(i8 *%src1, i8 *%src2) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: clc 0(256,%r2), 0(%r3)
|
|
; CHECK: jlh [[LABEL:\..*]]
|
|
; CHECK: clc 256(1,%r2), 256(%r3)
|
|
; CHECK: [[LABEL]]:
|
|
; CHECK: ipm [[REG:%r[0-5]]]
|
|
; CHECK: br %r14
|
|
%res = call i64 @memcmp(i8 *%src1, i8 *%src2, i64 257)
|
|
ret i64 %res
|
|
}
|